Ah, yes: the orks. Those guys weren't lucky recently. Their big plan to capture the Imperial castle has failed, even worse, their warboss is dead and their huge warmachine is in the grasps of those filthy humans.
Ork morale is pretty rock bottom.
However, this is the right time for one ambitious ork to rise: his name is Kensai, former second-in command, who is more clever than an average ork. He knew he was worthy to lead, yet never got the chance yet. However, now he can gain the clan's respect. Low on numbers, but with a new invention in his hand, Kensai takes risk, and once again leads his beaten warhorde to siege that hated castle.

The Imperium is pretty confident now. With obliterating the orks, they let their defences lower. Also, after a month of isolation news came from Direwood; and those were pretty grim. Niol gathered the grand army and marched to purge the undead... every castle has to rely on it's own. And a castle with his ruler deceased has a hard time to run properly...

So yeah, it's a rematch.

Invading forces:
23 units total

Defenders:
25 units (though 2 of them are useless) it's an "even" battle.

First turn consists of orks marching forward.

Second turn, the orks still advance, and manage to kill the catapult's crew on both sides.

The defenders take down 2 orks.

Turn 3:
TPSCAM, OMG!!!11
One archer is dead.

The trolls reach the drawbridge...

And smash it open.

Meanwhile the awesomeosaur decided to ram one of the corner's of the castle:
Resulting in this monster roll.

Also in this huge carnage. Two figs died from the rubble...

... and a third guy landed this far from the knockback. This is my new most painful death.

The defenders storm out to bash some ork butt, but miserably fail, and got decimated in the counterattacks.

Turn 4
Orks advance.

Troll smashes the fruit stand for no apparent reason.

The transport is up to something... Also a guy got shot by orks.

The defenders valiantly form up to defend the castle, some orks are killed also.

Turn 5
'WAAAAAAAAAAAAAAAAAAAAAGH', yells the ork on top.

And with full speed, the transport buttrapes the castle. (you read that right.)
The doors and rubble buries the peasants; they got squished.

The Hatch opens...

Orks swarm the interior and overkill the remaining guards.

Only two archers are alive now, and they debate whether to surrender or not.

Their argument ends with killing eachother, as they cannot decide what to do.

Ork Victory! WAAAAAAAAAAGH!

Kensai gained the position of warlord of the clans. The orky morale is better than ever, their bloodthirst has returned. And with Niol and the main force of the Imperium fighting up North, the Imperium is in really deep shit now...

Orkssum! Really cool battle, the Impirium didnt stand a chance with those vengeful Orks on a killing-spree! Also, that die roll was outta this world, almost enough to send the whole freaking castle flying!